101490031 has 4 divisors (see below), whose sum is σ = 103153864. Its totient is φ = 99826200.

The previous prime is 101490029. The next prime is 101490043. The reversal of 101490031 is 130094101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 101490031 - 2¹ = 101490029 is a prime.

It is a super-2 number, since 2×101490031² = 20600452784761922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101489990 and 101490008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101490091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 831825 + ... + 831946.

It is an arithmetic number, because the mean of its divisors is an integer number (25788466).

Almost surely, 2^101490031 is an apocalyptic number.

101490031 is the 6372-nd centered pentagonal number.

101490031 is a deficient number, since it is larger than the sum of its proper divisors (1663833).

101490031 is an equidigital number, since it uses as much as digits as its factorization.

101490031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663832.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 101490031 is about 10074.2260744933. The cubic root of 101490031 is about 466.4528973869.

The spelling of 101490031 in words is "one hundred one million, four hundred ninety thousand, thirty-one".